What is the primary function of trailer brakes?

The primary function of trailer brakes is to enhance overall braking power. When a truck is towing a trailer, the added weight and momentum of the trailer can significantly impact the stopping capability of the entire vehicle. Trailer brakes work in conjunction with the tow vehicle’s brakes, providing additional braking force to help bring the entire unit to a stop more effectively and safely. This coordination is particularly important in emergency braking situations or when navigating downhill.

While decreasing stopping distance is a benefit of effectively functioning trailer brakes, the main goal is to provide additional braking power that complements the primary vehicle’s brakes. Similarly, while trailer brakes can indirectly help with vehicle stability, their primary role is concentrated on the braking performance rather than fuel efficiency or stability alone.